Ranged cache invalidation

src/common/address_range.h

@@ -0,0 +1,33 @@
+/* This file is part of the dynarmic project.
+ * Copyright (c) 2016 MerryMage
+ * This software may be used and distributed according to the terms of the GNU
+ * General Public License version 2 or any later version.
+ */
+
+#pragma once
+
+#include <cstddef>
+
+#include <boost/variant.hpp>
+
+#include "common/common_types.h"
+
+namespace Dynarmic {
+namespace Common {
+
+struct FullAddressRange {};
+
+struct AddressInterval {
+    u32 start_address;
+    std::size_t length;
+
+    // Does this interval overlap with [from, to)?
+    bool Overlaps(u32 from, u32 to) const {
+        return start_address <= to && from <= start_address + length;
+    }
+};
+
+using AddressRange = boost::variant<FullAddressRange, AddressInterval>;
+
+} // namespace Common
+} // namespace Dynarmic